IBM EXP400 Type 1733, Руководство по техническому обслуживанию и ремонту

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Expansion unit bays
The following sections describe the hot-swap components of the expansion unit and
the bridge card bay.
With the hot-swap features of the expansion unit, you can remove and replace a
hard disk drive, power supply with fan unit, and ESM without turning off the
expansion unit. You can maintain the availability of your expansion unit while a
hot-swap component is removed, installed, or replaced.
Hot-swap hard disk drive bays
The following illustration shows the location of the hot-swap hard disk drive bays
that are accessible from the front of your expansion unit. The expansion unit
supports up to 14 IBM Ultra320 SCSI hard disk drives. These drives come
preassembled in a drive tray. You install the hard disk drives in the 14 drive bays on
the front of the expansion unit.
In the following illustration, seven of the 14 hard disk drive bays contain hard disk
drives, and seven bays contain filler panels. To maintain proper cooling within your
expansion unit, always keep a filler panel in each drive bay that does not contain a
hard disk drive. For information about installing and replacing drives, see “Working
with hot-swap hard disk drives” on page 24.
Attention: Never hot-swap a hard disk drive when its green activity LED is
flashing. Hot-swap a hard disk drive only when its amber status LED is lit (not
flashing) or when the drive is inactive with the green activity LED off (not flashing).
Use the ServeRAID system-management software to set the hard disk drive state to
“defunct” and then you can hot-swap it.
Bridge card bay
The following illustration shows the location of the bridge card bay. This bay is
accessible from the front of the expansion unit. You can replace the bridge card, but
you must turn off the expansion unit before doing so. For more information about
replacing a bridge card, see “Replacing a bridge card” on page 26.
Bridge card bay
Hot-swap drive bays
Filler panel
Bridge card bay
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IBM EXP400 Storage Expansion Unit Type 1733: Hardware Maintenance Manual and Troubleshooting Guide